rail-fence-cipher: Add topics to resolve #844
rail-fence-cipher: Add topics to resolve #844


behrtam/xpython,smalley/python,pheanex/xpython,pheanex/xpython,exercism/xpython,exercism/python,N-Parsons/exercism-python,smalley/python,jmluy/xpython,N-Parsons/exercism-python,exercism/xpython,jmluy/xpython,exercism/python,behrtam/xpython